專案依賴

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.7</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <dependencies>
        <!--SpringBoot通用依賴模組-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--整合druid連線池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.5</version>
        </dependency>
        <!-- MyBatis 生成器 -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.4.0</version>
        </dependency>
        <!--Mysql資料庫驅動-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.49</version>
        </dependency>
    </dependencies>
 

修改spring boot 配置檔案

在application.yml新增資料來源和mapper.xml路徑

server:
  port: 8080

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/lsv?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    username: root
    password: 123456

mybatis:
  mapper-locations:
    - classpath:mapper/*.xml
    - classpath*:com/**/mapper/*.xml
 

Mybatis generator 配置檔案

配置資料庫連線，Mybatis generator生成model、mapper介面及mapper.xml的路徑。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <properties resource="generator.properties"/>
    <context id="MySqlContext" targetRuntime="MyBatis3" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        <property name="javaFileEncoding" value="UTF-8"/>
        <!-- 為模型生成序列化方法-->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
        <!-- 為生成的Java模型建立一個toString方法 -->
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>
        <!--生成mapper.xml時覆蓋原檔案-->
        <plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin" />
        <commentGenerator type="com.gt.lsv.CommentGenerator">
            <!-- 是否去除自動生成的註釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
            <property name="suppressDate" value="true"/>
            <property name="addRemarkComments" value="true"/>
        </commentGenerator>

        <jdbcConnection driverClass="${jdbc.driverClass}"
                        connectionURL="${jdbc.connectionURL}"
                        userId="${jdbc.userId}"
                        password="${jdbc.password}">
            <!--解決mysql驅動升級到8.0後不生成指定資料庫程式碼的問題-->
            <property name="nullCatalogMeansCurrent" value="true" />
        </jdbcConnection>

        <javaModelGenerator targetPackage="com.gt.lsv.model" targetProject="H:\LSVProject\LSV\lsv_mgb\src\main\java"/>

        <sqlMapGenerator targetPackage="com.gt.lsv.mapper" targetProject="H:\LSVProject\LSV\lsv_mgb\src\main\resources"/>

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.gt.lsv.mapper"
                             targetProject="H:\LSVProject\LSV\lsv_mgb\src\main\java"/>
        <!--生成全部表tableName設為%-->
        <table tableName="%">
            <generatedKey column="id" sqlStatement="MySql" identity="true"/>
        </table>
    </context>
</generatorConfiguration>
 

執行Generator的main函式生成程式碼

package com.gt.lsv;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * @Description MGB生成程式碼
 * @Author ChenJG
 * @create 2022/5/12 16:55
 */

public class Generator {
    public static void main(String[] args) throws Exception {
        //MBG 執行過程中的警告資訊
        List<String> warnings = new ArrayList<>();
        //當生成的程式碼重複時，覆蓋原始碼
        boolean overwrite = true;
        //讀取我們的 MBG 配置檔案
        InputStream is = Generator.class.getResourceAsStream("/generatorConfig.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(is);
        is.close();

        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        //建立 MBG
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        //執行生成程式碼
        myBatisGenerator.generate(null);
        //輸出警告資訊
        for (String warning : warnings) {
            System.out.println(warning);
        }
    }
}

新增MyBatis的Java配置

用於動態生成mapper的路徑

package com.gt.lsv.portal.config;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Configuration;

/**
 * @Description MB Config
 * @Author ChenJG
 * @create 2022/5/20 20:15
 */
@Configuration
@MapperScan("com.gt.lsv.mapper")
public class MybatisConfig {
}